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Haskell, Reverse Polish Notation, and Parsing

news.ycombinator.com Unknown 2025-08-08 17:07:19

My Side Quest into Haskell, Reverse Polish Notation, and Parsing 26 Jun, 2025 My Journey into Haskell: Building a Reverse Polish Notation Calculator Introduction: A Side Quest In my attempt to get my first paycheck, aka get a job, I have led myself down a fascinating rabbit hole into functional programming, mathematical notation, and parsing theory. This is the story of how I discovered Haskell, tackled reverse Polish notation, and learned about monadic parsing along the way. My journey bega

Topics: eval haskell int parser xs
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Unexpected security footguns in Go's parsers

news.ycombinator.com Unknown 2025-08-31 15:35:12

In Go applications, parsing untrusted data creates a dangerous attack surface that’s routinely exploited in the wild. During our security assessments, we’ve repeatedly exploited unexpected behaviors in Go’s JSON, XML, and YAML parsers to bypass authentication, circumvent authorization controls, and exfiltrate sensitive data from production systems. These aren’t theoretical issues—they’ve led to documented vulnerabilities like CVE-2020-16250 (a Hashicorp Vault authentication bypass found by Goog

Topics: data field json parser xml
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